Free Practice Questions for Oracle 1z0-809 Exam

In 2015, daylight saving time in New York, USA, begins on March 8th at 2:00 AM. As a result, 2:00 AM becomes 3:00 AM.

Given the code fragment:

Which is the result?

Given the code fragment:

public static void main (String [ ] args) throws IOException {

BufferedReader br = new BufferedReader (new InputStremReader (System.in));

System.out.print (“Enter GDP: “);

//line 1

}

Which code fragment, when inserted at line 1, enables the code to read the GDP from the user?

Given the content of Operator.java, EngineOperator.java, and Engine.java files:

and the code fragment:

What is the result?

Given:

IntStream stream = IntStream.of (1,2,3);

IntFunction inFu= x -> y -> x*y;//line n1

IntStream newStream = stream.map(inFu.apply(10));//line n2

newStream.forEach(System.out::print);

Which modification enables the code fragment to compile?

Given:

class FuelNotAvailException extends Exception { }

class Vehicle {

void ride() throws FuelNotAvailException {//line n1

System.out.println(“Happy Journey!”);

}

}

class SolarVehicle extends Vehicle {

public void ride () throws Exception {//line n2

super ride ();

}

}

and the code fragment:

public static void main (String[] args) throws FuelNotAvailException, Exception {

Vehicle v = new SolarVehicle ();

v.ride();

}

Which modification enables the code fragment to print Happy Journey!?

Given the code fragment:

List colors = Arrays.asList(“red”, “green”, “yellow”);

Predicate test = n - > {

System.out.println(“Searching…”);

return n.contains(“red”);

};

colors.stream()

.filter(c -> c.length() >= 3)

.allMatch(test);

What is the result?

Given the code fragment:

List codes = Arrays.asList (“DOC”, “MPEG”, “JPEG”);

codes.forEach (c -> System.out.print(c + “ “));

String fmt = codes.stream()

.filter (s-> s.contains (“PEG”))

.reduce((s, t) -> s + t).get();

System.out.println(“\n” + fmt);

What is the result?

Given the code fragment:

public static void main (String[] args) throws IOException {

BufferedReader brCopy = null;

try (BufferedReader br = new BufferedReader (new FileReader(“employee.txt”))) { //

line n1

br.lines().forEach(c -> System.out.println(c));

brCopy = br;//line n2

}

brCopy.ready(); //line n3;

}

Assume that the ready method of the BufferedReader, when called on a closed BufferedReader, throws an exception, and employee.txt is accessible and contains valid text.

What is the result?

Given the code fragment:

Map books = new TreeMap<>();

books.put (1007, “A”);

books.put (1002, “C”);

books.put (1003, “B”);

books.put (1003, “B”);

System.out.println (books);

What is the result?

Given the code fragment:

Stream> iStr= Stream.of (

Arrays.asList (“1”, “John”),

Arrays.asList (“2”, null)0;

Stream< nInSt = iStr.flatMapToInt ((x) -> x.stream ());

nInSt.forEach (System.out :: print);

What is the result?